Chemical dosing apparatus



July 20 1926. 1,593,109

0. F. WALLACE CHEMICAL DOSING APPARATUS Filed March 6, 1924 2 Sheets-Sheet 1 I I) I2 I V A A :2 INVENTOR A TTORNEY s July 20, 1926.

C. F. WALLACE CHEMICAL DOSING APPARATUS 2 SheetsSheet 2 Fig.

Filed March 6, 924

Fig. iv

FigNlI 14% $53 BY 211w? CW1), MM W,

ATTORNEY? Patented July 20, 1926.

UNITED STATES PATENT OFFICE.

CHARLES F. WALLACE, OF WESTFIELD, NEW JERSEY,

Assnmoa TO WALLACE a TIERNAN PRODUCTS, 1 80., OF NEWARK, NEW JERSEY, A CORPORATION OF NEW JERSEY.

cnnmca'r. nosme APPARATUS.

Application filed March a, 1924. Serial No. 697,807.

As illustrative of the art tovwhich the invention, which forms the subject of my present application for Letters Patent, relates, I may'refer to the now widely practiced method of purifying water which consists in adding to a flow of untreated water a relatively minute quantity of some chemical in solution, such as or other desired reagent. which is typical of all those vention is applicable, it is manifestly of prime importance that the dose or doses of chemical introduced into the water or other liquid should be constant or proportional to In this method to which my in- 5 the flow under all circumstances and in conof the chemica level the conveyor and delivered to the body ofdition to thoroughly flow. I have devised the art as a chemical-dosing device, which renders this easy of accomplishment, which is or may be entirely automatic in operation and operative only general under perfect control.

Broadly stated, this apparatus. comprises what may be termed a conveyor and which is by preference a member in the form or .nature of a disk" artly submerged in a body l solution employed and which is rotated at a speed-proportionate to the flow of the water to be treated for which purpose it is most advantageously driven by or at a speed proportional to that of a meter through which the untreated water passes. The function of this conveyor is to take u from the body of the solution a limited quantity of the same at a uniform rate in suchmanner that at some point above the of the solution it may be taken ofi' from the water under treatment, or in-general to the point of application.

, In practice I accomplish this by means of a rotary disk partly immersed in the solution and rov ded at ornear its with cap' lary holes or recesses. take up very small quantities of the fluid'which is retamed' in them by capillary attraction ;or surface tension and at a proper point above the solution it is removed from the water.

disk by means of such a device as an aspirator and forced intothe flowing body of As the amount of solution thus added to the water should be always proportional to sodium hypochlorite,

mix with the larger .tion through AA of Fig. 2 an apparatus, known in.

where required and in periphery disk in order to fill them, and solution from the disk I employ an aspirator to withdraw it by suction,

and this aspirator I operate by a given por tion of the main flow of water at a proper pressure.

The apparatus in the best form in which I have devised it is illustrated in the accompanying drawing in which:

Fig. 1 is a view in elevation and part ,sec-

apparatus.

Fig. 2 is a plan view of the same. Fig. 3 is a section on line BB of Fig. 2 showing the suction take 011' on the side of the disk.

of the complete Fig. 4 is a similar section showing a modification of the recesses in the disk.

-Fi 5 is a sectional detail of the-suction .mem r as shown in Fig. .4. I Fig. 6 is a similar view showing the. ap-

plication of the suction member of- Fig. 3, and

of the disk with side recesses.

,7 is an enlarged detail of a portion- The apparatus is mounted upon a* suitable base 20. and comprises as its most essential parts -a container 1 for a solution of the chemical used and which is, preferably, in the nature of an inverted bottle resting upon a roper form of support 2-in a receptac e 3 which is connected by a duct 4 with a chamher 5. It is desirable that this chamber or tank be prpvided with an overflow 6 at a proper level. v I 7 On a shaft 9 passing through a bearing 10 in the side wall of the chamber 5 there is mounted adisk 7- having at or near its peripheral ed e a series 0 small recesses or holes 8-. e shaft 9 is adapted. tobe rotated, preferably by engagement with the gears 12 of a water meter 11, which, for reasons more fully hereinafter explained, is the best and. most convenient source of power forthis pu se.

By means of a pipe 11' running from the main flow pipe 13 water under the pressure of the main flow is carried to an aspirator the desired point of its a the water w ich number of disks tion, the rate 0 14, which causes a suction through the member 15 communicating with a passage through the part 16 suitably constructed and set so as to lie in-contact with the disk 7, in line with the recesses or holes therein.

From the aspirator 14 a discharge pipe 17 leads back to a coupling 18 in the mam flow pipe 13 on the opposite side of the meter 11. Between this coupling and the meter is a back pressure valve 19 set to"- maintain a differential pressure sufficient to o erate the aspirator 14, and the connecting pipe 11 contains a valve 21 for controlling the flow of water going to and operating the aspirator 14.

The operation of-the apparatus is as follows: The container 1 being filled with the proper solution, the receptacle 3 and communicating chamber 5 are filled to a certain level 22 by the inverted bottle action of the container. The water to be treated flowing from the source through the pipe 13 in the passage through the meter 11 operates the ear train 12 and from this train rotation is imparted to the disk 7 by the shaft 9, this rotation being manifestly in direct proportion to the flow of water.

As the disk revolves through the solution in the tank 5 the recesses in its edge or sides become filled and the liquid, retained therein by capillary attraction or surface tension, is carried around with the disk. As the recesses come under the action of the ne' ative head of the aspirator the liquid is .suc ed out of the recesses and forced to plication or use, e line of flow of has driven the'meter, the pressure in which has been reduced by the valve 19, or to any other desired point.

Variation of the amount or proportion of solution thus applied may besecured b; a variation of the size of the holes in the isk 7, or the number of holes in a given area, or the speed of the disllr, or by the width or use I have shown a water meter as the source of motive power for rotating the disk 7, andthis I have found most convenient, as by such means greater ease and perfection of adjustment of the proportional amount of solution to the tota amount of the water are secured. Where other means for driving the disk are used, and such means are manifestly that -is to sa backinto t application of the solution may be maintaine constant or ma be variable depending upon the rate 0 rotation which is imparted to the disk. I

The location and character of the solu tion retainipg recesses or uivalent means for takingkup the solution y the rotation of the di 7 are not-ofthe essence of the invention as thesemay be greatly varied. In'Fig'sl 4 and 6, for example, I have shown ermissible under my inven-- transverse holes 24 connecting with the radial holes 8 in the periphery of the disk. In such case the passage in the member 16 passes over the perip ery in the line of the holes 8.

Transverse holes 24 only may be used, as shown in Figs. 3, 5 and 7, in which case the opening of the assage in member 16 slides overone side 0 the disk in the line of'the males? 24; 4

device has been found most useful in the application of minute quantities of solution to liquids where the roportions of such supply to the flow are to e considered, such as in the purification of water by sodium hy ochlorite, alum, or other water treating so utions. The apparatus, moreover, lends itself to the use of materials which are practically resistant to corrosive solutions, as acids. p

The specific form or construction of the apparatus may be widely varied, and in the main it is obvious that it is the function rather than the character of the elements described which are important. For example, it would be within the invention to use some other means for removing the solution from the disk than the aspirator which I have shown and described.

What I claim is: 1. In an apparatus scribed, the combination with a receptacle for containing a chemical solution, a rotary,

-disk partly immersed in said solution and of such solution and means for conduc such of the kind herein dethrough the solution and means.

the solution thus removed to' its point 0 application.

2. In an apparatus of the kind herein described, the combination with a receptacle for containing a chemical solution, of a disk partially'submerged therein and containing at or near its periphery a series ofplas'pillary recesses, means for rotating the constructed to take up and retain portions of the solution, means for removing the solution from the recesses and means for conducting it to its point of ap ication.

3. In an apparatus of the d herein described, the combination with a receptacle for containing a chemical solution at a constant level, of a disk partially submerged in the solution and containing at or near its periphe a series of ca illary recesses which arefille while beneat the surface of the solution, means for rotating the disk, means for removing the solution from the recemes at a point above the level of the solution and means for applying the removed solution to treating a body of flowing water, the combination with a receptacle for,containing a chemical solution, of-a ,partly submerged disk having a, series of capillary recesses near its edge, a meter operated by the flow of the water to be treated, connections therefrom to and adapted to rotate the disk, means for removing the solution from the capillary recesses at a point above the level of the solution, and means for introducing such removed solution into the water to be treated.

5. In a chemical dosing apparatus for such purposes as treating a body of flowing water, the combination with a receptacle for containing a chemical solution, of a disk partly submerged therein and provided with a series of capillary recesses near its edge, a meter operated by the flowing water and connected with and rotating the disk, an aspirator for removing by suction the solution from the capillary recesses in the disk and connections therefrom to the point of application of the removed solution.

6. In a chemical dosing apparatus for scribed,

such purposes as treating a body of flowing water, the combination with a body of a chemical solution, a disk partly submerged therein and containing a series of capillary recesses near its edge, a meter for measuring the fiow of the water connected with and rotating the disk, an aspirator operated by the flow of a part of the main flow for removing by suction the solution from the capillary recesses and a connection from the same back to the main flow.

In an apparatus of the character dethe combination with a receptacle for containing a chemical solution, of a disk rotatable with apart of its periphery running in the solution and having said periphery provided with means for taking up and retaining small quantities of the solution, and devices for removing the solution by suction from said means and conducting it to the point of application of the removed solution.

In testimony whereof I hereto aifix my signature.

CHARLES F. WALLACE. 

